Display panel and preparation method thereof

Abstract

The application provides a display panel and a preparation method thereof. The display panel comprises an array substrate and a color film substrate. The array substrate comprises a first substrate, a driving circuit layer and a light-emitting component which are sequentially stacked. The color film substrate comprises a second substrate and a color film layer which is stacked on the second substrate. The driving circuit layer comprises a thin film transistor which is stacked on a display area and an auxiliary electrode which is stacked on a non-display area. The light-emitting component comprises an anode, a pixel definition layer, a cathode and a light-emitting layer. The color film layer comprises a color resistance which is opposite to the light-emitting layer and a black matrix which is located on both sides of the color resistance. The color film substrate further comprises an auxiliary cathode which is stacked on the black matrix. The auxiliary cathode extends and abuts against the cathode. The auxiliary electrode and the auxiliary cathode are electrically connected through a conductive frame glue. The thin film transistor and the auxiliary electrode receive a driving voltage and transmit the driving voltage to the anode and the cathode to excite the light-emitting layer to emit light. Meanwhile, the auxiliary cathode is added, the square resistance of the cathode is reduced, current pressure drop is avoided, and the display effect is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display panel, and particularly relates to a display panel and a preparation method thereof. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display devices are widely used due to their self-luminous, wide color gamut, low power consumption, and flexible display.

[0003] In a top emission type OLED display device, the light-emitting assembly at least includes an anode layer, a light-emitting layer, and a cathode layer. The anode and the cathode receive a driving voltage and excite the light-emitting layer to emit light. In order to improve the light transmittance, the cathode layer is designed to be thinner, but this will cause the sheet resistance of the cathode layer to increase, causing current pressure drop problems, and ultimately leading to uneven brightness of the display device. SUMMARY

[0004] The present application aims to provide a display panel, which aims to solve the problem of high sheet resistance of the traditional display panel.

[0005] The first aspect of the embodiment of the present application provides a display panel, comprising:

[0006] The array substrate comprises a first substrate, a driving circuit layer, and a light-emitting assembly which are sequentially stacked, the first substrate comprises a display area and a non-display area surrounding the display area, the driving circuit layer comprises a thin film transistor stacked on the display area and an auxiliary electrode stacked in the non-display area;

[0007] The light-emitting assembly comprises an anode, a pixel definition layer, a cathode, and a light-emitting layer, the anode is connected to the thin film transistor, the pixel definition layer is symmetrically arranged on both sides of the anode and forms a groove with the anode, the cathode is stacked on the pixel definition layer and does not contact the anode, and the light-emitting layer is arranged in the groove;

[0008] The color film substrate comprises a second substrate and a color film layer stacked on the second substrate, the color film layer comprises a color resistance opposite to the light-emitting layer and a black matrix located on both sides of the color resistance, and the color film substrate further comprises an auxiliary cathode stacked on the black matrix, the auxiliary cathode extends to abut against the cathode;

[0009] The conductive frame glue is stacked between the auxiliary electrode and the second substrate, and is used to electrically connect the auxiliary electrode and the auxiliary cathode.

[0010] Optionally, the anode comprises a first side, a second side, a third side and a fourth side, the first side and the second side of the anode are oppositely arranged, the third side and the fourth side of the anode are oppositely arranged, and the first side of the anode is connected with the thin film transistor;

[0011] The pixel definition layer comprises a first pixel definition layer in contact with the third side, a second pixel definition layer in contact with the fourth side, a third pixel definition layer and a fourth pixel definition layer laminated on both ends of the second side of the anode;

[0012] The cathode laminated on the first pixel definition layer and the second pixel definition layer is arranged separately from the anode through the third pixel definition layer and the fourth pixel definition layer.

[0013] Optionally, the light-emitting layer comprises a fifth side in contact with the anode and a sixth side opposite to the fifth side, and in a first direction, the size of the fifth side is smaller than the size of the sixth side, and the first direction is the extension direction of the first substrate;

[0014] The first pixel definition layer, the third pixel definition layer, the anode, the fourth pixel definition layer and the second pixel definition layer form an inverted trapezoidal groove.

[0015] Optionally, the cathode comprises a first cathode laminated on the first pixel definition layer and a second cathode laminated on the second pixel definition layer;

[0016] The first cathode comprises a first cathode segment and a second cathode segment connected with each other, the first cathode segment is laminated on the side of the first pixel definition layer away from the first substrate, and the second cathode segment is laminated on the side of the first pixel definition layer facing the inverted trapezoidal groove;

[0017] The second cathode comprises a third cathode segment and a fourth cathode segment connected with each other, the third cathode segment is laminated on the side of the second pixel definition layer away from the first substrate, and the fourth cathode segment is laminated on the side of the second pixel definition layer facing the inverted trapezoidal groove.

[0018] Optionally, the auxiliary cathode comprises a first auxiliary cathode and a second auxiliary cathode, a first end of the first auxiliary cathode extends to between the black matrix and the conductive frame glue, and a second end of the first auxiliary cathode extends to form a first protruding portion and abuts against the first cathode segment;

[0019] A first end of the second auxiliary cathode extends to between the black matrix and the conductive frame glue, and a second end of the second auxiliary cathode extends to form a second protruding portion and abuts against the third cathode segment.

[0020] The second aspect of the embodiment of the present application provides a preparation method of a display panel, comprising:

[0021] forming a driving circuit layer and a light-emitting component on a first substrate in sequence, the first substrate comprising a display area and a non-display area surrounding the display area, the driving circuit layer comprising a thin film transistor arranged on the display area in layers and an auxiliary electrode arranged on the non-display area in layers;

[0022] the light-emitting component comprising an anode, a pixel definition layer, a cathode and a light-emitting layer, the anode being connected to the thin film transistor, the pixel definition layer being symmetrically arranged on both sides of the anode and forming a groove with the anode, the cathode being arranged on the pixel definition layer in layers and not being in contact with the anode, the light-emitting layer being arranged in the groove;

[0023] forming a color film layer and an auxiliary cathode on a second substrate in sequence, the color film layer comprising color resist opposite to the light-emitting layer and black matrix on both sides of the color resist, the auxiliary cathode being arranged on the black matrix in layers and extending to abut the cathode;

[0024] forming a conductive frame adhesive between the auxiliary electrode and the second substrate, the conductive frame adhesive being used to electrically connect the auxiliary electrode and the auxiliary cathode.

[0025] Optionally, the forming of the driving circuit layer and the light-emitting component on the first substrate in sequence comprises:

[0026] forming the thin film transistor on the display area of the first substrate and forming the auxiliary electrode on the non-display area;

[0027] spacedly arranging the anode on the thin film transistor, the anode being connected to the thin film transistor through a conductive part;

[0028] forming the pixel definition layer on the anode and forming the groove;

[0029] forming the cathode on the pixel definition layer and forming the light-emitting layer in the groove.

[0030] Optionally, the anode comprises a first side, a second side, a third side and a fourth side, the first side and the second side of the anode being oppositely arranged, the third side and the fourth side of the anode being oppositely arranged, the first side of the anode being connected to the thin film transistor;

[0031] the pixel definition layer forming a first pixel definition layer in contact with the third side, a second pixel definition layer in contact with the fourth side, a third pixel definition layer and a fourth pixel definition layer arranged on both ends of the second side of the anode in layers;

[0032] A cathode laminated on the first pixel definition layer and the second pixel definition layer is arranged separately from the anode through the third pixel definition layer and the fourth pixel definition layer;

[0033] The light-emitting layer comprises a fifth side in contact with the anode and a sixth side opposite to the fifth side, and in a first direction, a size of the fifth side is smaller than a size of the sixth side, the first direction being an extension direction of the first substrate;

[0034] The first pixel definition layer, the third pixel definition layer, the anode, the fourth pixel definition layer and the second pixel definition layer form an inverted-trapezoidal groove.

[0035] Optionally, the cathode comprises a first cathode laminated on the first pixel definition layer and a second cathode laminated on the second pixel definition layer;

[0036] The first cathode comprises a first cathode segment and a second cathode segment connected to each other, the first cathode segment being laminated on a side of the first pixel definition layer away from the first substrate, and the second cathode segment being laminated on a side of the first pixel definition layer facing the inverted-trapezoidal groove;

[0037] The second cathode comprises a third cathode segment and a fourth cathode segment connected to each other, the third cathode segment being laminated on a side of the second pixel definition layer away from the first substrate, and the fourth cathode segment being laminated on a side of the second pixel definition layer facing the inverted-trapezoidal groove.

[0038] Optionally, the second substrate sequentially laminates a color filter layer and an auxiliary cathode to form the color filter layer, comprising:

[0039] The color filter layer is laminated on the second substrate, and the color filter layer comprises color resist opposite to the light-emitting layer and black matrixes located on both sides of the color resist;

[0040] The first auxiliary cathode and the second auxiliary cathode are respectively formed on the black matrixes, a first end of the first auxiliary cathode extends to between the conductive frame adhesives corresponding to the black matrixes, and a second end of the first auxiliary cathode extends to form a first protruding part and abuts against the first cathode segment;

[0041] A first end of the second auxiliary cathode extends to between the conductive frame adhesives corresponding to the black matrixes, and a second end of the second auxiliary cathode extends to form a second protruding part and abuts against the third cathode segment.

[0042] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows: The above-mentioned display panel includes an array substrate and a color filter substrate. The array substrate includes a first substrate, a driving circuit layer and a light-emitting component stacked in sequence. The color filter substrate includes a second substrate and a color filter layer stacked on the second substrate. The driving circuit layer includes thin film transistors stacked on the display area and auxiliary electrodes stacked on the non-display area. The light-emitting component includes an anode, a pixel definition layer, a cathode and a light-emitting layer. The color filter layer includes a color resist opposite to the light-emitting layer and a black matrix located on both sides of the color resist. The color filter substrate also includes an auxiliary cathode stacked on the black matrix. The auxiliary cathode extends and abuts against the cathode. The auxiliary electrode and the auxiliary cathode are electrically connected through conductive frame adhesive. The thin film transistor and the auxiliary electrode receive the driving voltage and transmit it to the anode and cathode to excite the light-emitting layer to emit light. At the same time, by adding an auxiliary cathode, the sheet resistance of the cathode is reduced, thereby avoiding current voltage drop and improving the display effect. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the display panel provided in Embodiment 1 of the present invention;

[0044] Figure 2 This is a schematic diagram of the array substrate provided in Embodiment 1 of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of the color filter substrate provided in Embodiment 1 of the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of the light-emitting component provided in Embodiment 1 of the present invention;

[0047] Figure 5 This is a schematic flowchart of the method for preparing a display panel according to Embodiment 2 of the present invention;

[0048] Figure 6 for Figure 5 A schematic flowchart of step S10 in the method for manufacturing the display panel shown.

[0049] Figure 7 for Figure 5 The flowchart of step S20 in the method for preparing the display panel is shown.

[0050] The figures in the diagram are labeled as follows:

[0051] 101, display area; 102, non-display area; 11, first substrate; 12, thin film transistor; 13, auxiliary electrode; 14, anode; 17, light emitting layer; 121, light shielding layer; 122, active layer; 123, gate insulating layer; 124, gate electrode; 125, source / drain electrode; 151, first pixel definition layer; 152, second pixel definition layer; 153, third pixel definition layer; 154, fourth pixel definition layer; 161, first cathode; 162, second cathode; 1611, first cathode segment; 1612, second cathode segment; 1621, third cathode segment; 1622, fourth cathode segment; 21, second substrate; 22, color resistance; 23, black matrix; 241, first auxiliary cathode; 242, second auxiliary cathode; 30, conductive frame glue. DETAILED DESCRIPTION

[0052] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0055] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0056] Embodiment one

[0057] The first aspect of the embodiment of the present application proposes a display panel, which is an OLED display panel.

[0058] AsFigure 1 As shown in the embodiment, the display panel comprises:

[0059] The array substrate comprises a first substrate 11, a driving circuit layer and a light-emitting component which are sequentially stacked, the first substrate 11 comprises a display area 101 and a non-display area 102 surrounding the display area 101, and the driving circuit layer comprises a thin film transistor 12 stacked on the display area 101 and an auxiliary electrode 13 stacked on the non-display area 102.

[0060] The light-emitting component comprises an anode 14, a pixel definition layer, a cathode and a light-emitting layer 17, the anode 14 is connected to the thin film transistor 12, the pixel definition layer is symmetrically arranged on both sides of the anode 14 and forms a groove with the anode 14, the cathode is stacked on the pixel definition layer and does not contact the anode 14, and the light-emitting layer 17 is arranged in the groove.

[0061] The color film substrate comprises a second substrate 21 and a color film layer stacked on the second substrate 21, the color film layer comprises a color resistance 22 opposite to the light-emitting layer 17 and a black matrix 23 on both sides of the color resistance 22, and the color film substrate further comprises an auxiliary cathode stacked on the black matrix 23, the auxiliary cathode extends to abut the cathode.

[0062] The conductive frame glue 30 is stacked between the auxiliary electrode 13 and the second substrate 21, and the conductive frame glue 30 is used to electrically connect the auxiliary electrode 13 and the auxiliary cathode.

[0063] As shown in the embodiment, Figure 2 The first substrate 11 can be divided into the display area 101 and the non-display area 102 surrounding the display area 101, the display area 101 is used to arrange pixel units in an array, the pixel unit at least comprises a corresponding thin film transistor 12 and a light-emitting component, a plurality of data lines and a plurality of scan lines can be arranged on the first substrate 11, the pixel unit corresponds to a data line and a scan line, the scan line is used to input a row scanning signal, the data line is used to input a data signal, and the corresponding thin film transistor 12 is triggered to open and transmit the data signal to the light-emitting component when receiving the row scanning signal, so as to excite the light-emitting component to emit light.

[0064] As shown in the embodiment, Figure 1 The thin film transistor 12 comprises an active layer 122, a source-drain electrode 125, a gate insulating layer 123 and a gate 124, the active layer 122, the gate insulating layer 123 and the gate 124 are sequentially stacked, the source-drain electrode 125 is arranged on both sides of the active layer 122, the gate insulating layer 123 is between the source-drain electrode 125, the source-drain electrode 125 is connected to the active layer 122 and the light-emitting component, and the gate 124 forms a path between the source-drain electrode 125 through the active layer 122 and transmits the data signal to the light-emitting component when receiving the row scanning signal.

[0065] In order to avoid the active layer 122 receiving light excitation to generate a path leading to leakage current, the thin film transistor 12 further comprises a light shielding layer 121, which is located between the first substrate 11 and the active layer 122, and along the extension direction of the first substrate 11, the size of the light shielding layer 121 is greater than or equal to the size of the active layer 122, so as to achieve effective light shielding of the active layer 122.

[0066] In the display area 101, the thin film transistor 12 and the light shielding layer 121 are located, and the non-display area 102 of the first substrate 11 is annularly provided with an auxiliary electrode 13 to form an auxiliary electrode ring, and the auxiliary electrode 13 is used to provide a ground signal.

[0067] The light emitting assembly comprises an anode 14, a pixel definition layer, a light emitting layer 17 and a cathode, wherein the anode 14 is stacked on the thin film transistor 12 through an interlayer structure, and is connected through a conductive part 18, which can be a metal material.

[0068] The pixel definition layer is used to realize the division of the light emitting area and the non-light emitting area, as shown in Figure 1 The pixel definition layer is formed into a groove structure by etching, laser and the like, and is arranged on both sides of the anode 14 and in contact with the anode 14, for example, the pixel definition layer can comprise a first pixel definition layer 151 and a second pixel definition layer 152 arranged on both sides of the anode 14, the first pixel definition layer 151, the anode 14 and the second pixel definition layer 152 form a groove, which is used to accommodate the light emitting layer 17, and meanwhile, the cathode is stacked on the pixel definition layer, for example, a first cathode 161 is stacked on the first pixel definition layer 151, and a second cathode 162 is stacked on the second pixel definition layer 152, and the cathode is not in direct contact with the anode 14, as shown in Figure 1 The cathode and the anode 14 can be isolated by the corresponding position of the pixel definition layer, or as shown in Figure 4 The cathode and the anode 14 are directly spaced apart, and when the cathode and the anode 14 input a driving voltage, the light emitting layer 17 emits light.

[0069] In an optional embodiment, in order to improve the insulation between the cathode and the anode 14, and avoid the generation of current pulses due to too small distance between the two, the cathode and the anode 14 are isolated by the corresponding position of the pixel definition layer.

[0070] As shown in Figure 1 The anode 14 comprises a first side, a second side, a third side and a fourth side, the first side and the second side of the anode 14 are oppositely arranged, the third side and the fourth side of the anode 14 are oppositely arranged, and the first side of the anode 14 is connected with the thin film transistor 12.

[0071] The pixel definition layer includes a first pixel definition layer 151 in contact with the third side, a second pixel definition layer 152 in contact with the fourth side, a third pixel definition layer 153 and a fourth pixel definition layer 154 laminated on both ends of the second side of the anode 14;

[0072] The cathode laminated on the first pixel definition layer 151 and the second pixel definition layer 152 is arranged to be isolated from the anode 14 by the third pixel definition layer 153 and the fourth pixel definition layer 154, respectively.

[0073] The pixel definition layer forms the first pixel definition layer 151, the second pixel definition layer 152, the third pixel definition layer 153, and the fourth pixel definition layer 154 by etching or laser, and the first pixel definition layer 151 and the second pixel definition layer 152 are used to form the cathode, respectively, and the third pixel definition layer 153 and the fourth pixel definition layer 154 are laminated on both ends of the anode 14, respectively, and the third pixel definition layer 153 is used to insulate and isolate the anode 14 and the cathode laminated on the first pixel definition layer 151, and the fourth pixel definition layer 154 is used to insulate and isolate the anode 14 and the cathode laminated on the second pixel definition layer 152.

[0074] As shown in the figure, Figure 1 The third pixel definition layer 153 and the fourth pixel definition layer 154 can be arranged in a rectangular shape, and the anode 14 and the cathode at the corresponding position can be in contact with the opposite two end faces or adjacent two end faces of the third pixel definition layer 153 and the fourth pixel definition layer 154, respectively, and the cathode and the anode 14 are arranged to be isolated by the third pixel definition layer 153 and the fourth pixel definition layer 154. For example, the first cathode 161 can be in contact with the first end face of the third pixel definition layer 153, the anode 14 can be in contact with the second end face of the third pixel definition layer 153, and the first end face and the second end face are arranged opposite to each other.

[0075] The groove can be a U-shaped groove, a square groove, a trapezoidal groove, etc., and the specific structure is arranged according to the light-emitting area of the light-emitting component. In an optional embodiment, in order to increase the light-emitting area, the groove is a reverse trapezoidal groove, wherein the light-emitting layer 17 includes a fifth side in contact with the anode 14 and a sixth side opposite to the fifth side, and along the first direction, the size of the fifth side is smaller than the size of the sixth side, and the first direction is the extension direction of the first substrate 11.

[0076] The first pixel definition layer 151, the third pixel definition layer 153, the anode 14, the fourth pixel definition layer 154, and the second pixel definition layer 152 form a reverse trapezoidal groove.

[0077] In the embodiment, the first pixel definition layer 151 and the second pixel definition layer 152 form a trapezoidal structure, the size of the upper end surface of the first pixel definition layer 151 is smaller than the size of the lower end surface, the size of the upper end surface of the second pixel definition layer 152 is smaller than the size of the lower end surface, and the side of the first pixel definition layer 151 and the second pixel definition layer 152 close to the light-emitting layer 17 forms a slope, thereby forming an inverted trapezoidal groove, along the extension direction of the first substrate 11, the size of the end surface of the light-emitting layer 17 grounded to the anode 14 is smaller than the size of the other end surface facing away from the anode 14, and by increasing the area of the light-emitting layer 17 towards the side of the color film substrate, the light-emitting area of the light-emitting component can be increased.

[0078] Wherein, the anode 14 and the cathode are metal materials, for example, high-conductivity and high-reflectivity metals such as Ag, when the anode 14 is made of a metal material, it has a reflection effect, that is, it will be reflected by ambient light, which affects the light-emitting efficiency, therefore, the color film substrate is fixedly installed on the array substrate by the conductive frame glue 30, as shown in Figure 1 and Figure 3 As shown, the color film layer includes black matrices 23 and color resistances 22 arranged at intervals, the color resistances 22 can be color resistances 22 of corresponding colors, such as red color resistances, blue color resistances, and green color resistances, the color resistances 22 are arranged corresponding to the light-emitting layer 17, along the extension direction of the first substrate 11 and the second substrate 21, the size of the color resistance 22 is equal to the size of one end of the light-emitting layer 17 towards the color resistance 22, that is, the color resistance 22 coincides with the light-emitting layer 17, the light of the light-emitting layer 17 can be emitted to the outside through the color resistance 22, at the same time, the color resistance 22 can also absorb the reflected ambient light, reduce the reflection of ambient light, and improve the light-emitting efficiency.

[0079] The black matrix 23 is arranged opposite to the pixel definition layer, along the extension direction of the first substrate 11 and the second substrate 21, the size of the black matrix 23 is the same as that of the corresponding pixel definition layer, for example, one of the black matrices 23 coincides with the side of the first pixel definition layer 151 towards the color film substrate, and the other black matrix 23 coincides with the side of the second pixel definition layer 152 towards the color film substrate, the black matrix 23 is used to realize light shielding and reduce the incidence of ambient light to the light-emitting layer 17.

[0080] Meanwhile, in order to reduce the sheet resistance of the cathode and avoid the light emitting component generating extra current voltage drop, an auxiliary cathode is further formed on the black matrix 23, the auxiliary cathode is arranged towards the array substrate, for example, a first auxiliary cathode 241 is formed on the black matrix 23 towards the first pixel defining layer 151, and a second auxiliary cathode 242 is formed on the black matrix 23 towards the second pixel defining layer 152, when the array substrate and the color filter substrate are fixedly installed by the conductive frame adhesive 30, the extension part on the auxiliary cathode abuts against the cathode, and the auxiliary cathode is further electrically connected with the conductive frame adhesive 30, when the auxiliary electrode 13 inputs the corresponding ground signal, the ground signal can reach the cathode through the conductive frame adhesive 30 and the auxiliary cathode and provide the ground signal, and form a driving signal with the data signal input by the anode 14 and excite the light emitting layer 17 to emit light.

[0081] Meanwhile, by stacking the auxiliary cathode, the thickness of the equivalent cathode of the auxiliary cathode and the cathode as a whole increases, the sheet resistance is inversely proportional to the thickness of the cathode, the greater the thickness, the smaller the sheet resistance, and the smaller the current voltage drop, therefore, by stacking the auxiliary cathode, the sheet resistance of the equivalent cathode can be reduced, and the current voltage drop of the pixel unit is further reduced, the overall brightness of the display panel is ensured to be consistent, the display uniformity of the display panel is realized, and the display effect is improved.

[0082] In addition, the auxiliary cathode is stacked on the black matrix 23, which does not affect the light emitting area of the light emitting layer 17, wherein, in order to reduce the reflection of the auxiliary cathode to the ambient light, the size of the corresponding auxiliary cathode is smaller than the size of the black matrix 23 along the extension direction of the second substrate 21.

[0083] The conductive frame adhesive 30 realizes the fixed installation of the array substrate and the color filter substrate on the one hand, and realizes the electrical connection and signal transmission of the auxiliary cathode and the auxiliary electrode 13 on the other hand, the conductive frame adhesive 30 is provided with conductive adhesive, which can realize the electrical connection of the auxiliary cathode and the auxiliary electrode 13 and the transmission of the ground signal.

[0084] The cathode can be arranged according to the shape and number of the pixel defining layer, in an optional embodiment, the cathode includes a first cathode 161 stacked on the first pixel defining layer 151 and a second cathode 162 stacked on the second pixel defining layer 152.

[0085] The first cathode 161 includes a first cathode segment 1611 and a second cathode segment 1612 connected with each other, the first cathode segment 1611 is stacked on the side of the first pixel defining layer 151 away from the first substrate 11, and the second cathode segment 1612 is stacked on the side of the first pixel defining layer 151 towards the inverted trapezoidal groove;

[0086] The second cathode 162 includes a third cathode segment 1621 and a fourth cathode segment 1622 connected in series, the third cathode segment 1621 is laminated on the side of the second pixel definition layer 152 away from the first substrate 11, and the fourth cathode segment 1622 is laminated on the side of the second pixel definition layer 152 facing the inverted trapezoidal groove.

[0087] In the embodiment, the inverted trapezoidal groove is formed by etching, laser and the like corresponding to the pixel definition layer, the light-emitting layer 17 is filled in the groove, and the cathode is divided into the first cathode 161 and the second cathode 162 corresponding to the shape structure of the pixel definition layer, the first cathode 161 includes a first cathode segment 1611 and a second cathode segment 1612, the first cathode segment 1611 is used for abutting against the auxiliary cathode and transmitting the ground signal, and the second cathode segment 1612 is used for transmitting the ground signal to the light-emitting layer 17, and similarly, the second cathode 162 includes a third cathode segment 1621 and a fourth cathode segment 1622, the third cathode segment 1621 is used for abutting against the corresponding auxiliary cathode and transmitting the ground signal, and the fourth cathode segment 1622 is used for transmitting the ground signal to the light-emitting layer 17, so as to realize bilateral transmission of the ground signal.

[0088] Correspondingly, in order to realize abutment and signal transmission of the first cathode 161 and the second cathode 162, in an optional embodiment, the auxiliary cathode includes a first auxiliary cathode 241 and a second auxiliary cathode 242, a first end of the first auxiliary cathode 241 extends to between the conductive frame glue 30 corresponding to the black matrix 23, and a second end of the first auxiliary cathode 241 extends to form a first protruding portion and abuts against the first cathode segment 1611.

[0089] A first end of the second auxiliary cathode 242 extends to between the conductive frame glue 30 corresponding to the black matrix 23, and a second end of the second auxiliary cathode 242 extends to form a second protruding portion and abuts against the third cathode segment 1621.

[0090] The first end of the first auxiliary cathode 241 and the first end of the second auxiliary cathode 242 respectively extend to the gap between the conductive frame glue 30 and the black matrix 23, so as to fill the gap and realize electrical connection with the conductive frame glue 30, and the second end of the first auxiliary cathode 241 and the second end of the second auxiliary cathode 242 respectively form the first protruding portion and the second protruding portion, when the array substrate and the color film substrate are fixed by the conductive frame glue 30, the first protruding portion abuts against the first cathode segment 1611, the second protruding portion abuts against the third cathode segment 1621, and the first protruding portion and the second protruding portion respectively transmit the ground signal.

[0091] The beneficial effects of the embodiment of the present application compared with the prior art are: the display panel includes an array substrate and a color film substrate, the array substrate includes a first substrate 11, a driving circuit layer and a light emitting component which are sequentially stacked, the color film substrate includes a second substrate 21 and a color film layer which is stacked on the second substrate 21, the driving circuit layer includes a thin film transistor 12 which is stacked on a display area 101 and an auxiliary electrode 13 which is stacked on a non-display area 102, the light emitting component includes an anode 14, a pixel definition layer, a cathode and a light emitting layer 17, the color film layer includes a color resistance 22 which is opposite to the light emitting layer 17 and a black matrix 23 which is located on both sides of the color resistance 22, the color film substrate further includes an auxiliary cathode which is stacked on the black matrix 23, the auxiliary cathode extends to abut the cathode, the auxiliary electrode 13 and the auxiliary cathode are electrically connected through a conductive frame glue 30, the thin film transistor 12 and the auxiliary electrode 13 receive a driving voltage and transmit the driving voltage to the anode 14 and the cathode to excite the light emitting layer 17 to emit light, at the same time, by increasing the auxiliary cathode, the sheet resistance of the cathode is reduced, thereby avoiding current voltage drop and improving display effect.

[0092] Embodiment two

[0093] Corresponding to the structure of the display panel, the second aspect of the embodiment of the present application proposes a preparation method of a display panel, as shown in Figure 5 The preparation method of the display panel includes:

[0094] S10, sequentially stacking a driving circuit layer and a light emitting component on the first substrate 11, the first substrate 11 includes a display area 101 and a non-display area 102 which surrounds the display area 101, the driving circuit layer includes a thin film transistor 12 which is stacked on the display area 101 and an auxiliary electrode 13 which is stacked on the non-display area 102.

[0095] The light emitting component includes an anode 14, a pixel definition layer, a cathode and a light emitting layer 17, the anode 14 is connected with the thin film transistor 12, the pixel definition layer is symmetrically arranged on both sides of the anode 14 and forms a groove with the anode 14, the cathode is stacked on the pixel definition layer and does not contact the anode 14, and the light emitting layer 17 is arranged in the groove;

[0096] S20, sequentially stacking a color film layer and an auxiliary cathode on the second substrate 21, the color film layer includes a color resistance 22 which is opposite to the light emitting layer 17 and a black matrix 23 which is located on both sides of the color resistance 22, and the auxiliary cathode is stacked on the black matrix 23 and extends to abut the cathode.

[0097] In this embodiment, a first substrate 11 and a second substrate 21 are first provided, and a driving circuit layer and a light-emitting component are sequentially stacked on the first substrate 11. The first substrate 11, the driving circuit layer and the light-emitting component constitute an array substrate. The first substrate 11 can be divided into a display area 101 and a non-display area 102 surrounding the display area 101. The display area 101 is used to set up pixel units arranged in an array. The pixel unit includes at least a corresponding thin film transistor 12 and a light-emitting component. Multiple columns of data lines and multiple rows of scan lines can also be set on the first substrate 11. The pixel unit is connected to a data line and a scan line respectively. The scan line is used to input a row scan signal, and the data line is used to input a data signal. When the corresponding thin film transistor 12 receives the row scan signal, it is triggered to turn on and transmits the data signal to the light-emitting component to excite the light-emitting component to emit light.

[0098] The driving circuit layer includes thin-film transistors 12 stacked on the display area 101 and auxiliary electrodes 13 stacked on the non-display area 102. The auxiliary electrodes 13 are arranged in a ring to form an auxiliary electrode ring, and the auxiliary electrodes 13 are used to provide a ground signal.

[0099] Among them, such as Figure 1 As shown, the thin-film transistor 12 includes an active layer 122, source and drain electrodes 125, a gate insulating layer 123, and a gate electrode 124. The active layer 122, the gate insulating layer 123, and the gate electrode 124 are stacked sequentially. The source and drain electrodes 125 are disposed on both sides of the active layer 122, and the gate insulating layer 123 is located between the source and drain electrodes 125. The source and drain electrodes 125 connect the active layer 122 and the light-emitting component. When the gate electrode 124 receives a horizontal scanning signal, a path is formed between the source and drain electrodes 125 through the active layer 122, and the data signal is transmitted to the light-emitting component.

[0100] In order to prevent leakage current caused by light excitation to the active layer 122, the thin film transistor 12 also includes a light-shielding layer 121. The light-shielding layer 121 is located between the first substrate 11 and the active layer 122. Along the extension direction of the first substrate 11, the size of the light-shielding layer 121 is greater than or equal to the size of the active layer 122, thereby achieving effective light shielding of the active layer 122.

[0101] The light-emitting component includes an anode 14, a pixel definition layer, a light-emitting layer 17, and a cathode. The anode 14 is stacked on the thin-film transistor 12 through an interlayer structure and connected through a conductive part 18, which may be a metallic material.

[0102] The pixel definition layer is used to divide the luminous and non-luminous regions, such as... Figure 1As shown, the pixel definition layer forms a groove structure through etching, laser engraving, etc., and is disposed on both sides of the anode 14 and in contact with the anode 14. For example, the pixel definition layer may include a first pixel definition layer 151 and a second pixel definition layer 152 disposed on both sides of the anode 14. The first pixel definition layer 151, the anode 14, and the second pixel definition layer 152 form a groove, which is used to accommodate the light-emitting layer 17. At the same time, a cathode is also stacked on the pixel definition layer. For example, a first cathode 161 is stacked on the first pixel definition layer 151, and a second cathode 162 is stacked on the second pixel definition layer 152. The cathode and the anode 14 are not in direct contact. Figure 1 As shown, the cathode and anode 14 can be isolated at corresponding positions in the pixel definition layer, or as... Figure 4 As shown, the cathode and anode 14 are directly spaced apart. When a driving voltage is input to the cathode and anode 14, the light-emitting layer 17 emits light.

[0103] In an optional embodiment, in order to improve the insulation between the cathode and anode 14 and avoid the generation of current pulses due to the small distance between them, the cathode and anode 14 are isolated by corresponding positions of the pixel definition layer.

[0104] Among them, such as Figure 1 As shown, the anode 14 includes a first side, a second side, a third side, and a fourth side. The first and second sides of the anode 14 are arranged opposite to each other, the third and fourth sides of the anode 14 are arranged opposite to each other, and the first side of the anode 14 is connected to the thin-film transistor 12.

[0105] The pixel definition layer includes a first pixel definition layer 151 that contacts the third side, a second pixel definition layer 152 that contacts the fourth side, a third pixel definition layer 153 and a fourth pixel definition layer 154 that are stacked on both ends of the second side of the anode 14;

[0106] The cathodes, which are stacked on the first pixel definition layer 151 and the second pixel definition layer 152, are isolated from the anode 14 through the third pixel definition layer 153 and the fourth pixel definition layer 154, respectively.

[0107] The pixel definition layers are formed by etching and laser etching to form a first pixel definition layer 151, a second pixel definition layer 152, a third pixel definition layer 153, and a fourth pixel definition layer 154. The first pixel definition layer 151 and the second pixel definition layer 152 are used to form cathodes respectively. The third pixel definition layer 153 and the fourth pixel definition layer 154 are respectively stacked on both ends of the anode 14. The third pixel definition layer 153 is used to insulate and isolate the anode 14 and the cathode stacked on the first pixel definition layer 151. The fourth pixel definition layer 154 is used to insulate and isolate the anode 14 and the cathode stacked on the second pixel definition layer 152.

[0108] As shown in Figure 1 The third pixel definition layer 153 and the fourth pixel definition layer 154 can be arranged in a rectangular shape, and the anode 14 and the cathode at the corresponding positions can be in contact with the opposite two end faces or adjacent two end faces of the third pixel definition layer 153 and the fourth pixel definition layer 154, respectively, and the cathode and the anode 14 are arranged in isolation through the third pixel definition layer 153 and the fourth pixel definition layer 154. For example, the first cathode 161 can be in contact with the first end face of the third pixel definition layer 153, and the anode 14 can be in contact with the second end face of the third pixel definition layer 153, and the first end face and the second end face are arranged opposite to each other.

[0109] The recess can be a U-shaped recess, a square recess, a trapezoidal recess, etc., and the specific structure can be arranged according to the light-emitting area of the light-emitting component. In an optional embodiment, in order to increase the light-emitting area, the recess is a reverse trapezoidal groove, wherein the light-emitting layer 17 includes a fifth side in contact with the anode 14 and a sixth side opposite to the fifth side, and along the first direction, the size of the fifth side is smaller than the size of the sixth side, and the first direction is the extension direction of the first substrate 11.

[0110] The first pixel definition layer 151, the third pixel definition layer 153, the anode 14, the fourth pixel definition layer 154, and the second pixel definition layer 152 form a reverse trapezoidal groove.

[0111] The first pixel definition layer 151 and the second pixel definition layer 152 form a trapezoidal structure, the size of the upper end face of the first pixel definition layer 151 is smaller than the size of the lower end face, the size of the upper end face of the second pixel definition layer 152 is smaller than the size of the lower end face, and the side of the first pixel definition layer 151 and the second pixel definition layer 152 close to the light-emitting layer 17 forms a slope, thereby forming a reverse trapezoidal groove, and along the extension direction of the first substrate 11, the size of the end face of the light-emitting layer 17 in contact with the anode 14 is smaller than the size of the other end face away from the anode 14. By increasing the area of the light-emitting layer 17 towards the side of the color filter substrate, the light-emitting area of the light-emitting component can be increased.

[0112] The anode 14 and the cathode are made of metal material, such as Ag and other high-conductivity and high-reflectivity metals. When the anode 14 is made of metal material, it has a reflection effect, i.e., it will be reflected by ambient light, which affects the light-emitting efficiency. Therefore, a color filter layer is prepared on the second substrate 21, which includes a black matrix 23 and a color resist 22 arranged in a spaced manner. The color resist 22 can be a color resist 22 of a corresponding color, such as a red color resist, a blue color resist, and a green color resist. The color resist 22 is arranged corresponding to the light-emitting layer 17, and along the extension direction of the first substrate 11 and the second substrate 21, the size of the color resist 22 is equal to the size of one end of the light-emitting layer 17 towards the color resist 22, i.e., the color resist 22 coincides with the light-emitting layer 17. The light of the light-emitting layer 17 can be emitted to the outside through the color resist 22, and at the same time, the color resist 22 can also absorb the reflected ambient light, reduce the reflection of ambient light, and improve the light-emitting efficiency.

[0113] The black matrix 23 is arranged opposite to the pixel definition layer, and along the extension direction of the first substrate 11 and the second substrate 21, the size of the black matrix 23 is the same as the corresponding pixel definition layer, for example, one of the black matrix 23 coincides with the first pixel definition layer 151 toward one side of the color film substrate, and the other side of the black matrix 23 coincides with the second pixel definition layer 152 toward one side of the color film substrate, and the black matrix 23 is used to achieve light shielding and reduce the incidence of ambient light to the light-emitting layer 17.

[0114] At the same time, in order to reduce the sheet resistance of the cathode and avoid the generation of additional current voltage drop of the light-emitting component, an auxiliary cathode is also formed on the black matrix 23, the auxiliary cathode is arranged toward the array substrate, for example, the first auxiliary cathode 241 is formed on the black matrix 23 toward the first pixel definition layer 151, and the second auxiliary cathode 242 is formed on the black matrix 23 toward the second pixel definition layer 152, the auxiliary cathode is stacked on the black matrix 23, and does not affect the light-emitting area of the light-emitting layer 17, wherein in order to reduce the reflection of ambient light by the auxiliary cathode, along the extension direction of the second substrate 21, the size of the corresponding auxiliary cathode is smaller than the size of the black matrix 23.

[0115] By stacking the auxiliary cathode, the thickness of the equivalent cathode of the auxiliary cathode and the cathode as a whole increases, and the sheet resistance is inversely proportional to the thickness of the cathode, the greater the thickness, the smaller the sheet resistance, and the smaller the current voltage drop, therefore, by stacking the auxiliary cathode, the sheet resistance of the equivalent cathode can be reduced, and the current voltage drop of the pixel unit can be reduced, the overall brightness of the display panel is ensured to be consistent, the display uniformity of the display panel is achieved, and the display effect is improved.

[0116] The array substrate can be prepared according to the positions of the driving circuit layer and the light-emitting component, for example, as shown in FIG. 1, the array substrate 10 includes: Figure 6 S10 includes:

[0117] S11, a thin film transistor 12 is formed on the display area 101 of the first substrate 11, and an auxiliary electrode 13 is formed on the non-display area 102;

[0118] S12, an anode 14 is formed on the thin film transistor 12 in a spaced manner, and the anode 14 is connected to the thin film transistor 12 through a conductive part 18;

[0119] S13, a pixel definition layer is formed on the anode 14, and a groove is formed;

[0120] S14, a cathode is formed on the pixel definition layer, and a light-emitting layer 17 is filled in the groove.

[0121] In this embodiment, firstly, the thin film transistor 12 is formed in the display area 101 of the first substrate 11, and the auxiliary electrode 13 is formed around the non-display area 102 to form an auxiliary electrode ring, then the anode 14 is stacked on the thin film transistor 12 through the interlayer structure, and is connected through the conductive part 18, then the pixel definition layer is formed on the anode 14, and the corresponding first pixel definition layer 151, second pixel definition layer 152, third pixel definition layer 153, and fourth pixel definition layer 154 are formed by etching, laser, or the like, the first pixel definition layer 151, the third pixel definition layer 153, the anode 14, the fourth pixel definition layer 154, and the first pixel definition layer 151 form a groove for accommodating the light-emitting layer 17, the light-emitting layer 17 is formed by filling, injecting, or the like in the groove, and the first cathode 161 is stacked on the first pixel definition layer 151, and the second cathode 162 is stacked on the second pixel definition layer 152, thereby forming the array substrate.

[0122] In this embodiment, the cathode includes the first cathode 161 stacked on the first pixel definition layer 151 and the second cathode 162 stacked on the second pixel definition layer 152.

[0123] The first cathode 161 includes the first cathode segment 1611 and the second cathode segment 1612 connected to each other, the first cathode segment 1611 is stacked on the side of the first pixel definition layer 151 away from the first substrate 11, and the second cathode segment 1612 is stacked on the side of the first pixel definition layer 151 facing the inverted-trapezoidal groove.

[0124] The second cathode 162 includes the third cathode segment 1621 and the fourth cathode segment 1622 connected to each other, the third cathode segment 1621 is stacked on the side of the second pixel definition layer 152 away from the first substrate 11, and the fourth cathode segment 1622 is stacked on the side of the second pixel definition layer 152 facing the inverted-trapezoidal groove.

[0125] In this embodiment, the inverted-trapezoidal groove is formed by corresponding etching, laser, or the like on the pixel definition layer, the cathode is divided into the first cathode 161 and the second cathode 162 corresponding to the shape structure of the pixel definition layer, the first cathode 161 includes the first cathode segment 1611 and the second cathode segment 1612, the first cathode segment 1611 is used to abut against the auxiliary cathode and transmit the ground signal, and the second cathode segment 1612 is used to transmit the ground signal to the light-emitting layer 17, similarly, the second cathode 162 includes the third cathode segment 1621 and the fourth cathode segment 1622, the third cathode segment 1621 is used to abut against the corresponding auxiliary cathode and transmit the ground signal, and the fourth cathode segment 1622 is used to transmit the ground signal to the light-emitting layer 17, thereby realizing bilateral transmission of the ground signal.

[0126] The color film substrate is arranged according to the position and size of the light emitting layer 17 of the array substrate. In an optional embodiment, as shown in FIG. 2, S20 includes: Figure 7

[0127] S21, a color film layer is formed by layering on the second substrate 21, and the color film layer includes a color resistance 22 opposite to the light emitting layer 17 and a black matrix 23 on both sides of the color resistance 22.

[0128] S22, a first auxiliary cathode 241 and a second auxiliary cathode 242 are respectively formed on the two sides of the black matrix 23, a first end of the first auxiliary cathode 241 extends to between the conductive frame glue 30 corresponding to the black matrix 23, and a second end of the first auxiliary cathode 241 extends to form a first protruding part and abuts against the first cathode segment 1611.

[0129] A first end of the second auxiliary cathode 242 extends to between the conductive frame glue 30 corresponding to the black matrix 23, and a second end of the second auxiliary cathode 242 extends to form a second protruding part and abuts against the third cathode segment 1621.

[0130] The color film substrate is formed by layering the color film layer and the auxiliary cathode on the second substrate 21 in sequence, wherein the first auxiliary cathode 241 and the second auxiliary cathode 242 can be respectively deposited and formed, or the auxiliary cathode is integrally formed on the color film layer, and the first auxiliary cathode 241 and the second auxiliary cathode 242 are formed by etching, laser, or the like.

[0131] The first end of the first auxiliary cathode 241 and the second auxiliary cathode 242 respectively extends to the gap between the conductive frame glue 30 and the black matrix 23, so as to fill the gap and realize electrical connection with the conductive frame glue 30, and the second end of the first auxiliary cathode 241 and the second auxiliary cathode 242 respectively forms the first protruding part and the second protruding part, when the array substrate and the color film substrate are fixed by the conductive frame glue 30, the first protruding part abuts against the first cathode segment 1611, the second protruding part abuts against the third cathode segment 1621, and the first protruding part and the second protruding part respectively transmit the ground signal.

[0132] S30, the conductive frame glue 30 is formed between the auxiliary electrode 13 and the second substrate 21, and the conductive frame glue 30 is used for electrically connecting the auxiliary electrode 13 and the auxiliary cathode.

[0133] ​After the array substrate and the color film substrate are formed respectively, the array substrate and the color film substrate are fixedly installed through the conductive frame adhesive 30, the conductive frame adhesive 30 is arranged between the auxiliary electrode 13 and the second substrate 21, when the array substrate and the color film substrate are fixedly installed through the conductive frame adhesive 30, the extension part on the auxiliary cathode is abutted with the cathode, meanwhile the auxiliary cathode is also electrically connected with the conductive frame adhesive 30, when the auxiliary electrode 13 inputs the corresponding ground signal, the ground signal can reach the cathode through the conductive frame adhesive 30 and the auxiliary cathode and provide the ground signal, and form the driving signal with the data signal inputted by the anode 14 and excite the light-emitting layer 17 to emit light.

[0134] It should be understood that the size of the serial number of each step in the above-mentioned embodiments does not mean the order of execution, the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0135] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A display panel, characterized by, The array substrate comprises a first substrate, a driving circuit layer and a light-emitting component which are sequentially stacked, the first substrate comprises a display area and a non-display area surrounding the display area, the driving circuit layer comprises a thin film transistor which is stacked on the display area and an auxiliary electrode which is stacked on the non-display area and is used to provide a ground signal; The light-emitting component comprises an anode, a pixel definition layer, a cathode and a light-emitting layer, the anode is connected with the thin film transistor, the pixel definition layer is symmetrically arranged on both sides of the anode and forms a groove with the anode, the cathode is stacked on the pixel definition layer and does not contact the anode, and the light-emitting layer is arranged in the groove; The color film substrate comprises a second substrate and a color film layer which is stacked on the second substrate, the color film layer comprises a color resistance which faces the light-emitting layer and a black matrix which is located on both sides of the color resistance, the color film substrate further comprises an auxiliary cathode which is stacked on the black matrix, the auxiliary cathode is arranged towards the array substrate, the auxiliary cathode extends to abut the cathode, and the thickness of the equivalent cathode of the auxiliary cathode and the cathode as a whole is increased; The conductive frame glue is stacked between the auxiliary electrode and the second substrate and is used to electrically connect the auxiliary electrode and the auxiliary cathode. The anode comprises a first side, a second side, a third side and a fourth side, the first side and the second side of the anode are oppositely arranged, the third side and the fourth side of the anode are oppositely arranged, and the first side of the anode is connected with the thin film transistor; 2. The display panel of claim 1, wherein, The pixel definition layer comprises a first pixel definition layer which is in contact with the third side, a second pixel definition layer which is in contact with the fourth side, a third pixel definition layer which is stacked on both ends of the second side of the anode and a fourth pixel definition layer; The cathode which is stacked on the first pixel definition layer and the second pixel definition layer is arranged separately from the anode through the third pixel definition layer and the fourth pixel definition layer. The light-emitting layer comprises a fifth side which is in contact with the anode and a sixth side which faces away from the fifth side, in a first direction, the size of the fifth side is smaller than the size of the sixth side, and the first direction is the extension direction of the first substrate; 3. The display panel of claim 2, wherein, The first pixel definition layer, the third pixel definition layer, the anode, the fourth pixel definition layer and the second pixel definition layer form an inverted trapezoidal groove. The cathode comprises a first cathode which is stacked on the first pixel definition layer and a second cathode which is stacked on the second pixel definition layer; 4. The display panel of claim 3, wherein, The first cathode comprises a first cathode segment and a second cathode segment which are connected, the first cathode segment is stacked on the side of the first pixel definition layer which faces away from the first substrate, and the second cathode segment is stacked on the side of the first pixel definition layer which faces the inverted trapezoidal groove; The second cathode comprises a third cathode segment and a fourth cathode segment which are connected, the third cathode segment is stacked on the side of the second pixel definition layer which faces away from the first substrate, and the fourth cathode segment is stacked on the side of the second pixel definition layer which faces the inverted trapezoidal groove. ​ 5. The display panel of claim 4, wherein, The auxiliary cathode comprises a first auxiliary cathode and a second auxiliary cathode, a first end of the first auxiliary cathode extends between the conductive frame glue corresponding to the black matrix, and a second end of the first auxiliary cathode extends to form a first protruding part and abuts against the first cathode segment; A first end of the second auxiliary cathode extends between the conductive frame glue corresponding to the black matrix, and a second end of the second auxiliary cathode extends to form a second protruding part and abuts against the third cathode segment.

6. A method for manufacturing a display panel, characterized by, Comprise: A driving circuit layer and a light-emitting assembly are sequentially stacked on a first substrate, the first substrate comprises a display area and a non-display area surrounding the display area, the driving circuit layer comprises a thin film transistor stacked on the display area and an auxiliary electrode stacked on the non-display area, and the auxiliary electrode is used to provide a ground signal; The light-emitting assembly comprises an anode, a pixel definition layer, a cathode and a light-emitting layer, the anode is connected with the thin film transistor, the pixel definition layer is symmetrically arranged on both sides of the anode and forms a groove with the anode, the cathode is stacked on the pixel definition layer and is not in contact with the anode, and the light-emitting layer is arranged in the groove; A color film layer and an auxiliary cathode are sequentially stacked on a second substrate, the color film layer comprises color resist opposite to the light-emitting layer and black matrix on both sides of the color resist, the auxiliary cathode is stacked on the black matrix and extends to abut against the cathode, the auxiliary cathode is arranged towards an array substrate, the array substrate comprises the first substrate, the driving circuit layer and the light-emitting assembly stacked, and the thickness of an equivalent cathode of the auxiliary cathode and the cathode as a whole is increased; A conductive frame glue is formed between the auxiliary electrode and the second substrate, and the conductive frame glue is used to electrically connect the auxiliary electrode and the auxiliary cathode.

7. The method of producing a display panel according to claim 6, wherein The sequentially stacking the driving circuit layer and the light-emitting assembly on the first substrate comprises: The thin film transistor is stacked in the display area of the first substrate, and the auxiliary electrode is stacked in the non-display area; The anode is spacedly stacked between the thin film transistors, and the anode is connected with the thin film transistor through a conductive part; The pixel definition layer is formed on the anode and the groove is formed; The cathode is stacked on the pixel definition layer, and the light-emitting layer is filled in the groove.

8. The method of producing a display panel according to claim 7, wherein The anode comprises a first side, a second side, a third side and a fourth side, the first side and the second side of the anode are oppositely arranged, the third side and the fourth side of the anode are oppositely arranged, and the first side of the anode is connected with the thin film transistor; The pixel definition layer forms a first pixel definition layer in contact with the third side, a second pixel definition layer in contact with the fourth side, a third pixel definition layer and a fourth pixel definition layer stacked on both ends of the second side of the anode; The cathode stacked on the first pixel definition layer and the second pixel definition layer is spacedly arranged from the anode through the third pixel definition layer and the fourth pixel definition layer respectively. The light-emitting layer comprises a fifth side in contact with the anode and a sixth side opposite to the fifth side, the size of the fifth side is smaller than the size of the sixth side in a first direction, the first direction being the extending direction of the first substrate; The first pixel definition layer, the third pixel definition layer, the anode, the fourth pixel definition layer and the second pixel definition layer form an inverted trapezoidal groove.

9. The method of producing a display panel according to claim 8, wherein The cathode comprises a first cathode laminated on the first pixel definition layer and a second cathode laminated on the second pixel definition layer; The first cathode comprises a first cathode segment and a second cathode segment connected to each other, the first cathode segment being laminated on the side of the first pixel definition layer away from the first substrate, and the second cathode segment being laminated on the side of the first pixel definition layer facing the inverted trapezoidal groove; The second cathode comprises a third cathode segment and a fourth cathode segment connected to each other, the third cathode segment being laminated on the side of the second pixel definition layer away from the first substrate, and the fourth cathode segment being laminated on the side of the second pixel definition layer facing the inverted trapezoidal groove.

10. The method of producing a display panel according to claim 9, wherein The second substrate sequentially laminates to form a color filter layer and an auxiliary cathode, comprising: The color filter layer is laminated on the second substrate, and the color filter layer comprises color resistance opposite to the light-emitting layer and black matrixes on both sides of the color resistance; The first auxiliary cathode and the second auxiliary cathode are respectively formed on the black matrixes on both sides, the first end of the first auxiliary cathode extends between the conductive frame adhesives corresponding to the black matrixes, the second end of the first auxiliary cathode extends to form a first protruding portion and abuts against the first cathode segment; The first end of the second auxiliary cathode extends between the conductive frame adhesives corresponding to the black matrixes, and the second end of the second auxiliary cathode extends to form a second protruding portion and abuts against the third cathode segment.

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